Zanzibar is known for beaches, spice markets and tradition. Once you have done your climbing of Kilimanjaro, joined your safaris and seen the Big Five a few times, it is great to relax here.
The Ngorongoro Crater is one of those places in Africa where you can find all wildlife - including the Big Five - on a very small area. And they will stay there till you visit as well, because they are "trapped" in a large volcano crater with steep walls around them...
The Serengeti is the largest area in the world where lions, giraffe, elephants, rhino, zebra, gnu and many other animals run around in their natural habitat. The plains are mostly wide-open and safaris are the most common activity. The Serengeti is partly in Tanzania, partly in Kenya - but animals don´t need passports to cross the border for their endless migration...
Dar es Salaam is the largest city and harbour of Tanzania.
The Selous Game Reserve is a protected area in southern Tanzania. It covers a total area of 50,000 km2 and is herewith larger than The Netherlands. It was designated a UNESCO World Heritage Site in thanks to its biodiversity and large, natural landscapes,